Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > S. interpunctatum

The Specimen

Stenacron interpunctatum (Light Cahill) Mayfly DunStenacron interpunctatum (Light Cahill) Mayfly Dun View 6 PicturesThis is a fairly small late-season female Stenacron dun.
Collected August 22, 2006 from the West Branch of Owego Creek in New York
Added to Troutnut.com by on August 23, 2006

The Discussion

TaxonAugust 24th, 2006, 12:24 am
Site Editor
Plano, TX

Posts: 1294
Looks to be Stenacron interpunctatum (Stenonema heterotarsale).
Roger Rohrbeck
www.FlyfishingEntomology.com
TroutnutAugust 24th, 2006, 8:29 am
Administrator
Bellevue, WA

Posts: 2539
Thanks. I guess that's sort of the default guess.

Do you know any reference to rule out the other species of Stenacron? I'll have to check my papers more carefully but I don't think I've found a good one yet. You're probably right just based on distribution and abundance, but I've collected such a wide range of Stenacron specimens (all listed under interpunctatum on this site) that it's hard to believe they're all the same species.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
TaxonAugust 24th, 2006, 12:26 pm
Site Editor
Plano, TX

Posts: 1294
Jason-

My guess is based on the striking similarity of your photo to the photo labeled "Stenonema heterotarsale, female dun" on Color Plate XI in Hatches II. The wing coloring, venation, and marking are about as close as I've ever seen.
Roger Rohrbeck
www.FlyfishingEntomology.com
WiflyfisherAugust 24th, 2006, 6:34 pm
Wisconsin

Posts: 603
My guess is based on the striking similarity of your photo to the photo labeled "Stenonema heterotarsale, female dun" on Color Plate XI in Hatches II. The wing coloring, venation, and marking are about as close as I've ever seen.


In the past I have caught those same mayflies on the *********** River in NW WI. and came to the same conclusion using photos in Hatches.
John S.
https://WiFlyFisher.com
TroutnutAugust 24th, 2006, 7:36 pm
Administrator
Bellevue, WA

Posts: 2539
My main concern with the identification is that the differences between different Stenacron species may only be discernible in the male spinner forceps or nymph mouth parts or something. I'll try to find a better reference to the genus and figure iout.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
TaxonAugust 24th, 2006, 8:45 pm
Site Editor
Plano, TX

Posts: 1294
Jason-

Good point. Let me know what you find.
Roger Rohrbeck
www.FlyfishingEntomology.com

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.

Related Discussions

TitleRepliesLast Reply
Re: Insect photos on CatskillFlies website
In the Mayfly Genus Ephemerella by Jpsully
4May 24, 2008
by Softhackle
Re: Lifestage
In Male Ephemera simulans Mayfly Dun by Taxon
1Jul 2, 2019
by Troutnut
Re: Not Stenacron
In Male Maccaffertium modestum Mayfly Dun by GONZO
2Dec 15, 2012
by Brookyman
Re: cahills
In the Mayfly Genus Stenacron by LittleJ
8Dec 1, 2006
by Troutnut
Re: from Brazil
In the Identify This! Board by Lufi
19Sep 3, 2010
by Lufi
Re: Interesting clinger species
In the Identify This! Board by CalebBoyle
7Mar 31, 2007
by GONZO
Re: Short Strike Streamer Swipers
In General Discussion by Dryfly
14Jun 12, 2009
by Aaron7_8
Re: Spinner?
In Male Neoleptophlebia heteronea Mayfly Adult by Martinlf
1May 19, 2012
by Taxon
Re: Stenacron
In the Identify This! Board by Crepuscular
1Mar 12, 2013
by Brookyman
Anyone able to ID this Chloroperlid?
In Female Sweltsa Stonefly Adult by Troutnut
0
Most Recent Posts
Re: Fly fishing etiquette
In General Discussion by Red_green_h (Jmd123 replied)
Re: Site updates from September 8, 2019
In Site Updates by Troutnut (RleeP replied)
Re: Looking for advice
In Fly Tying by OldHasBeen
Re: Site updates from September 13, 2019
In Site Updates by Troutnut (Martinlf replied)
Re: Site updates from September 11, 2019
In Site Updates by Troutnut (Martinlf replied)
Re: Site updates from September 10, 2019
In Site Updates by Troutnut (Martinlf replied)
Re: Ice dub versus sparkle dub
In Fly Tying by Brian314
Site updates from September 4, 2019
In Site Updates by Troutnut
Re: Ophiogomphus occidentis
In the Identify This! Board by Millcreek (Troutnut replied)
Re: Summer to fall - What's happened to the fishing :)
In General Discussion by TDMunro (Partsman replied)